Nigel is 100% correct.
Why, exactly, are you ******ing with a perfectly good, new, WARRANTIED, 300HP, (again) NEW car?
Aren't the monster payments enough, without warranty claims being shot down by SoA in the first year?
Your OEM clutch is OEM crap, wait and see if anything else craps out before you open this can of worms.
A quick Q: Can you drive your new STi to its' peak abilities already?
Since you won't drive it in the rain, I doubt it-no offense.
Auto-X it, stock, & run some eighths and quarters...& actually learn the car before you modify it all to hell.
My STi became a race-car-for-street by sheer necessity-it fell apart due to previous abuse,& I had it slowly rebuilt, to top quality specs, at great cost, over the past 2.5 years.
Also, you're FAR too concerned about nickels & dimes, the best parts are a cost-be-damned investment, & remember, eBay-esque parts get eBay-esque results. Spend the Right Money, Once. You'll be happier you did.
XXX